diablue

Plugin allows admin to upload custom logo for WordPress login page.
After activating the plugin, follow these steps:
<ol>
<li>Go to Settings -> Custom Login Logo</li>
<li>Click “Choose Image”</li>
<li>Select or upload your logo</li>
<li>Click Save Changes</li>
<li>Refresh the login page to see the new logo</li>
</ol>

Diablue Login Customizer

Easily add a custom logo to your WordPress login page using the built-in media uploader. Change WordPress login logo from admin panel.

sureshdsk

Use wp-login customizer to change wordpress logo,background image and Powered by wordpress.org link on your wordpress login page. 
More information: <a href="http://www.cloudwark.in/wp-login-customizer-wordpress-plugin" rel="nofollow ugc">wp-login customizer</a>
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wp-login customizer

Customize wordpress logo,background image and Powered by wordpress.org link on wordpress login page.

Diablue Login Customizer vs wp-login customizer